Council Directive 92/58/EECShow full title

Council Directive 92/58/EEC of 24 June 1992 on the minimum requirements for the provision of safety and /or health signs at work (ninth individual Directive within the meaning of Article 16 (1) of Directive 89/391/EEC)

6.Depending on requirements, signs and signalling devices must be cleaned, maintained, checked, repaired, and if necessary replaced on a regular basis to ensure that they retain their intrinsic and/or functional qualitities.